Rockwell-automation 2706-ND1 DL40 OFFLINE PROGRAMMING SFTWR.USER MANUA Manual de usuario descargar pdf (Pagina 57)

Chapter 5

The Develop Menu

5–12

More about variables

You can send variables to the DL40 from a PLC or via the Parallel Input

Port. Variables can be sent to message only in the Message/Variable/Slave or

Message/Variable Run Modes. You can insert variables by using the [CTRL]

key in combination with a letter. Commands to add or modify variables

include:

Command Function

[CTRL][V] Insert a BCD or binary variable

[CTRL][F] Change the formatting parameters of a variable

[CTRL]W] Insert ASCII or BCD variable data

[CTRL][X] Insert request for ASCII input data

[CTRL][T] Insert the system time into a message

[CTRL][Y] Insert the system date into a message

The number of variables you can insert in any one message depends upon

your hardware and the Run Mode you have chosen.

Insert Formatted Variable With [CTRL][V]

Use [CTRL][V] to insert a BCD or binary variable into a message. Specify

the variable type.

When you press [CTRL][V], the software will ask you to enter 3 parameters:

Parameter Acceptable values

Variable Size 1 to 7 (including decimal point)

Decimal Point Position

(number of placed after the

decimal point)

0 to 6 (the maximum value is one less than the

variable size selected above)

Suppress Zeroes

(appearing in front of the

first significant digit)

Yes or No

The variable symbol _____S____ will appear in your message at the

variable’s location.

The difference between a formatted variable entered with [CTRL][V] and an

unformatted variable entered with [CTRL][W] lies in the flexibility provided

by the ability to modify the parameters shown above.

Note that neither AutoRun Messages or Background Messages support

inserted variable data.

Change Formatted Variable With [CTRL][F]

Use [CTRL][F] to change the formatting parameters of a variable. To do so,

place the cursor under the symbol for the variable you want to change, then

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Rockwell-automation 2706-ND1 DL40 OFFLINE PROGRAMMING SFTWR.USER MANUA Manual de usuario Pagina 57

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